四川盆地嘉陵江组层序—岩相古地理特征和储层预测
- 教育部油气资源与勘察技术重点实验室 湖北荆州 434023
- 收稿日期:
1900-01-01
- 修回日期:
1900-01-01
- 刊出日期:
2010-12-10
摘要: 四川盆地下三叠统嘉陵江组发育有碳酸盐台地相沉积体系和碎屑岩—碳酸盐混积沉积体系以及混积潮坪、开阔台地、局限台地和蒸发台地等四种相类型。以沉积相和层序界面识别为依据,将四川盆地下三叠统嘉陵江组划分出3个三级层序和6个体系域,编制了四川盆地嘉陵江组各体系域的层序—岩相古地理图,对鲕滩和白云岩储层的分布规律进行了预测。研究表明四川盆地嘉陵江组自西向东相带分异明显,其中在海侵体系域以开阔台地相沉积为主,在盆地东部和中部一带发育有台地浅滩相储层;在高位体系域时期以局限—蒸发台地相沉积为主,在盆地北部和东北部发育有晶粒白云岩储层,据此指出了盆地有利含油远景勘探区带。
Characteristics of Sequencebased Lithofacies and Paleogeography,and Reservoir Prediction of the Jialingjiang Formation in Sichuan Basin
- Key Laboratory of Exploration Technologies for Oil and Gas Resource of Ministry of Education, Yangtze University, Jingzhou, Hubei 434023
- Received Date:
1900-01-01
- Rev Recd Date:
1900-01-01
- Publish Date:
2010-12-10
Abstract: The Jialingjiang Formation of Lower Triassic in Sichuan basin is composed of carbonate platform sedimentary system and carbonateterrigenous clastic sedimentary system, and including four major sedimentary facies such as carbonateterrigenous clastic tidal, restricted platform, open platform and evaporite platform. In the end of Feixianguan stage of Early Triassic, there was a largescale regression and regional exposure and erosion in the Upper Yangtze maritime space, and until early Jialingjiang stage the Upper Yangtze maritime space undergoed extensive transgression and accepted the deposition again. Therefore, at the bottom of Jialingjiang Formation of Lower Triassic developed partial exposure unconformity surface and inner of the Jialingjiang Formation mainly developed lithologylithofacies transformational sequence interface. According to the tracing and recognition of sequence interface and through the sequence stratigraphy division of typical singlewell and the sequence stratigraphy comparison of well tie, the Jialingjiang Formation of Lower Triassic in Sichuan basin can be devided into 3 thirdorder sequences. The sequence 1 which is located in the lower part of Jialingjiang Formation belongs to the type Ⅰ sequence, the sequence 2 and 3 in the middle and supreme part belongs to the type Ⅱ sequence. Based on the sequence stratigraphy division and sedimentary facies analysis, we first systematic compiled the sequencelithofacies paleographic map of each system tract with the system tract as unit and analysed the characteristic of sequencelithofacies paleographic of Jialingjiang Formation in the study area. It shows that from west to east in Sichuan Basin with a clear differentiation in the plane , in the vertical facies belt with a clear evolution. Open platform facies are dominated and oolitic shoal reservoirs are the most developed ones in the east and middle part of Sichuan basin during the trassgrassive system tracts, restricted and evaporite platform facies are dominated and dolomite reservoirs are the most developed ones in the north and northeast part of Sichuan basin during the highstand system tracts. It can be divided into three types oil prospect zone in Sichuan basin Primarily based on reservoir distribution, united of generating rock, reservoircapping rock composition and forming conditions. The most favorable oil prospect zone is located in northeast Sichuan basin,because granule shoal reservoirs and dolomite reservoirs are the most favorable developed and it is also the karst slope distributed area. The more favorable oil prospect zone is from Hechuan in central of Sichuan to Gaoxun in south of Sichuan. This district developed the granule shoal reservoirs and dolomite reservoirs and we have found several accumulation of gas in Jialingjiang Formation, so it's the more favorable oil and gas prospect zone in Sichuan Basin.
胡明毅. 四川盆地嘉陵江组层序—岩相古地理特征和储层预测[J]. 沉积学报, 2010, 28(6): 1145-1152.
引用本文: |
胡明毅. 四川盆地嘉陵江组层序—岩相古地理特征和储层预测[J]. 沉积学报, 2010, 28(6): 1145-1152.
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HU Mingyi. Characteristics of Sequencebased Lithofacies and Paleogeography,and Reservoir Prediction of the Jialingjiang Formation in Sichuan Basin[J]. Acta Sedimentologica Sinica, 2010, 28(6): 1145-1152.
Citation: |
HU Mingyi. Characteristics of Sequencebased Lithofacies and Paleogeography,and Reservoir Prediction of the Jialingjiang Formation in Sichuan Basin[J]. Acta Sedimentologica Sinica, 2010, 28(6): 1145-1152.
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